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EP1779050A1 - Irradiation unit - Google Patents

Irradiation unit

Info

Publication number
EP1779050A1
EP1779050A1 EP05767850A EP05767850A EP1779050A1 EP 1779050 A1 EP1779050 A1 EP 1779050A1 EP 05767850 A EP05767850 A EP 05767850A EP 05767850 A EP05767850 A EP 05767850A EP 1779050 A1 EP1779050 A1 EP 1779050A1
Authority
EP
European Patent Office
Prior art keywords
profile
reflector
irradiation unit
unit according
carrier
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP05767850A
Other languages
German (de)
French (fr)
Other versions
EP1779050B1 (en
Inventor
Oliver Treichel
Klaus Ebinger
Joachim Jung
Günter Fuchs
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IST Metz GmbH
Original Assignee
IST Metz GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Application filed by IST Metz GmbH filed Critical IST Metz GmbH
Publication of EP1779050A1 publication Critical patent/EP1779050A1/en
Application granted granted Critical
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Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/28—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/005—Reflectors for light sources with an elongated shape to cooperate with linear light sources

Definitions

  • the invention relates to an irradiation unit for UV irradiation of particular sheet-like substrates with a housing, a rod-shaped UV lamp arranged therein and a reflector arrangement extending along the UV lamp.
  • the present invention seeks to improve an aggregate of the type specified in that the Prior art disadvantages have been avoided and a variable use is possible.
  • the reflector arrangement has a carrier profile held in the housing and a reflector profile which can be detachably connected thereto and is designed as a dimensionally stable molded part and thus exchangeable.
  • a modular structure is created in a simple manner, which makes it possible to optimally adapt the irradiation profile to the respective process conditions.
  • a defined geometry is predetermined over the length of the lamp, which can also be exchanged at short notice with regard to various parameters such as the chemical formulation of the coating agent to be hardened, the still acceptable heat input to the substrate and the irradiation duration or dose can be adjusted. The correct interpretations often only result after extensive tests.
  • a plurality of reflector profiles with different reflector geometries and / or surface coatings as Baukastensys ⁇ system optionally connectable to the carrier profile, wherein by uniform Connecting surfaces regardless of the reflector geometry easy installation is guaranteed.
  • a further improvement provides that the reflector profile and the carrier profile can be brought into contact with one another by means of positive connection surfaces in flat heat-conducting contact. It is advantageous if the reflector gate profile and the carrier profile are held in mutual surface contact via connecting means, in particular screw connections.
  • connection means are operable from the rear side facing away from the reflector profile of the carrier profile. It is also favorable if the connecting means are accessible from the outside of the housing by housing flaps that can be closed, for example.
  • a further advantageous embodiment provides that the connecting means seen in the profile direction preferably allow a thermal compensation play between reflector profile and carrier profile via a slot mounting.
  • the connecting means are formed by the shaft preferably screwed to stop in the reflector profile and the head side preferably via spring and / or sliding discs on the Su ⁇ profile supported bolt.
  • the carrier profile can be acted upon by cooling, in particular ei ⁇ ne water cooling with coolant.
  • cooling in particular ei ⁇ ne water cooling with coolant.
  • the carrier profile is provided with profile channels for the passage of coolant. This also makes it possible to exchange the reflector profiles without interrupting the cooling system in a short time.
  • connection surface can therefore be formed uniformly for a standardized receptacle, while the reflector surface is selectively adapted to the radiation conditions.
  • the reflector profile is provided on its side facing the UV lamp profile side with a reflection coating.
  • the reflector profile is formed as a solid body of a solid material.
  • the reflector profile and the carrier profile preferably consist of extruded aluminum parts.
  • a further simplification also with regard to the required apparatuses for the reflector coating results from the fact that a plurality of reflector profiles are assembled on the face side as a profile strand. It should be ensured that the joints, which may have a lower reflection value, are offset with a pairwise reflector arrangement and are not opposite each other.
  • a heat conducting, in particular thermal paste is introduced.
  • a carrier profile and an associated reflector gate profile are arranged in pairs on both sides of a longitudinal center plane of the UV lamp.
  • two reflector profiles, together with associated carrier profiles to be arranged in the housing so as to be pivotable relative to each other about an axis extending in the profile direction.
  • FIG. 1 shows a UV irradiation unit for drying printing webs in cross section.
  • Fig. 2 is a partial enlargement of a screw in the region of a reflector assembly of the unit according to Fig.1.
  • the UV irradiation unit shown in the drawing consists essentially of a box-shaped housing 10, a rod-shaped UV lamp 12 arranged therein, a reflector arrangement 14 for reflecting the UV light radiated into the housing 10 onto a base-side housing opening 16 and an absorber 18 for dissipating heat loss via a cooling device, not shown.
  • the UV lamp 12 is arranged as a double-ended medium-pressure gas discharge lamp in the central longitudinal plane 20 of the housing 10 and emits its radiation via the housing opening 16 to the substrate web guided underneath or to the object to be irradiated.
  • the UV lamp 12 is surrounded in its pointing into the housing interior sector over its length by the reflector assembly 14, the reflected light according to reflector geometry divergent, parallel or bundled through the housing opening 16 through becomes. It is also conceivable that different reflection geometries are realized in reflector subregions.
  • the reflector arrangement 14 comprises carrier profiles 22 and detachably connected reflector profiles 24.
  • the carrier and reflector profiles are arranged in pairs on both sides of the longitudinal center plane 20 of the housing 10 or the UV lamp 12. orders, wherein the profile direction is parallel to the lamp axis. They are made of aluminum as massive extruded profile parts, so that in particular the reflector profiles 24 are designed to be dimensionally stable as complex shaped moldings. It is possible to use different reflector profiles 24 in the manner of a modular system. This is shown in FIG. 1 for the sake of better illustration for two reflector geometries on the left and right of the middle plane 20, wherein profile-like parts are usually arranged mirror-symmetrically in practical use, but in principle also a-symmetrical arrangements are possible.
  • the reflector profiles 24 and carrier profiles 22 can be brought into positive contact with large-area heat-conducting contact via complementary complementary connection surfaces 26, 28.
  • the carrier profiles 22 can be connected to the cooling device via profile channels 30 for the passage of cooling water. In this way it is possible to work with high lamp powers in the range of a few 10 kW.
  • the carrier profile 22 and the reflector profile 24 are held in mutual contact in the region of the connecting surfaces 26, 28 via screw connections 32.
  • screw connections 32 are accessible from the outside of the housing by housing flaps 34.
  • the screw connections 32 are formed by stud bolts 36, which can be screwed into the reflector profile 24 from the rear side 38 of the carrier profile 22.
  • the stud bolts 36 are screwed with their stepped threaded shaft 40 to stop in the reflector profile 24.
  • the screw head 42 is supported by disc springs 44 and sliding discs 46 with defined adhesion to the support section 22.
  • the step opening 48 is formed in the profile direction as a slot. - / -
  • the reflector surface 50 of the reflector profiles 24 facing the UV lamp 12 can be designed independently of the profile contour of the connection surface 26. Elliptic, parabolic and circular reflector geometries as well as combinations thereof are used. Also conceivable are reflector surfaces 50 with Freilinien ⁇ forms.
  • the spectral range of the reflected light can be influenced.
  • High-purity aluminum surfaces reflect the entire spectrum, while so-called cold-light mirror coatings reflect only selected spectral bandwidths in the UV range, depending on the design.
  • the heat absorbed in the reflector arrangement 14 can also be dissipated through the air cooling system with suction through the exhaust air duct 54.
  • the UV and IR emission of the gas discharge lamp 12 can not be switched on and off spontaneously for physical reasons. Therefore, it is intended to bring the reflector assembly 14 during startup or Millun ⁇ interruptions in a standby position in which the Gesimouseöff ⁇ opening 16 is mechanically sealed against radiation passage.
  • the carrier profiles are movable relative to one another about a pivot axis or axis of rotation running parallel to the profile direction, the IR power being absorbed by the cooled absorber 18. From this position can be changed without significant loss of time by pressing the folding or rotating mechanism in the production mode.
  • a movable reflector it is also possible to use a separate closure system.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Coating Apparatus (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)

Abstract

The invention relates to an irradiation unit for the UV irradiation of particularly web-shaped substrates, comprising a housing (10), a tubular UV lamp (12), arranged therein and a reflector arrangement (14), running along the UV lamp (12). According to the invention, a simple exchangeability may be achieved, whereby the reflector arrangement comprises a support profile (22), retained in the housing (10) and a reflector profile (24), embodied as a shape-retaining molded piece which may be detachably connected thereto.

Description

BesÜ:rahlungssggr©gatBesÜ: rahlungssggr © gat

Beschreibungdescription

Die Erfindung betrifft ein Bestrahlungsaggregat zur UV-Bestrahlung von ins¬ besondere bahnförmigen Substraten mit einem Gehäuse, einer darin ange¬ ordneten stabförmigen UV-Lampe und einer längs der UV-Lampe sich erstreckenden Reflektoranordnung.The invention relates to an irradiation unit for UV irradiation of particular sheet-like substrates with a housing, a rod-shaped UV lamp arranged therein and a reflector arrangement extending along the UV lamp.

Die UV-Trocknung und Vernetzung von Lacken, Farben sowie Klebstoffen unter Ausnutzung des Energieinhalts von Lichtquanten im UV-Lichtbereich mit Hilfe von lang gestreckten Mitteldruck-Gasentladungslampen findet seit über 30 Jahren breiten industriellen Einsatz in der Druck-, Verpackungs- und Oberflächenindustrie. Lösemittelfreiheit beim Prozess und die Erreichbarkeit hoher Vernetzungsdichten bei Bearbeitungszeiten im Durchlauf von Bruch¬ teilen einer Sekunde sind die hauptsächlichen Merkmale dieser Technik. Mitteldruck-Gasentladungslampen emittieren Licht vom kurzwelligen UV über den sichtbaren Bereich bis hin zum langwelligen IR. Die Wirkung des Reflek¬ tors bei solchen UV-Aggregaten ist nicht zu unterschätzen. Je nach Form und Geometrie beträgt sein Anteil an der auf dem Substrat wirksamen Ge¬ samtemission 50 bis 90%. Im Falle von selektiver Reflektion kann auch das Verhältnis von UV-Licht zu IR-Wärmeanteil gesteuert werden. In diesem Zu¬ sammenhang wurde bereits vorgeschlagen, flexible Metallstreifen als Reflek¬ tor gehäusefest einzuspannen. Als nachteilig hierbei wird empfunden, dass es damit nicht möglich ist, eine spezifische Reflektorgeometrie in einfacher Weise anzupassen. Außerdem erscheint es fraglich, ob sich solche Kon¬ struktionen im industriellen Dauerbetrieb unter hoher Temperaturbeanspru¬ chung bewähren können.The UV drying and crosslinking of paints, inks and adhesives utilizing the energy content of light quanta in the UV light range with the help of long-stretched medium-pressure gas discharge lamps has been widely used in industry for over 30 years in the printing, packaging and surface industries. Solvent-free in the process and the availability of high crosslinking densities at processing times in the passage of fractions of a second are the main features of this technique. Medium-pressure gas discharge lamps emit light from the short-wave UV over the visible range up to the long-wave IR. The effect of the reflector in such UV aggregates should not be underestimated. Depending on the shape and geometry, its proportion of the total emission effective on the substrate is 50 to 90%. In the case of selective reflection, the ratio of UV light to IR heat share can also be controlled. In this context it has already been proposed to clamp flexible metal strips as a reflector fixed to the housing. A disadvantage here is that it is thus not possible to adapt a specific reflector geometry in a simple manner. Moreover, it seems questionable whether such constructions can prove themselves in industrial continuous operation under high temperature stressing.

Ausgehend hiervon liegt der Erfindung die Aufgabe zugrunde, ein Aggregat der eingangs angegebenen Art dahingehend zu verbessern, dass die im Stand der Technik aufgetretenen Nachteile vermieden werden und ein vari¬ abler Einsatz möglich ist.Proceeding from this, the present invention seeks to improve an aggregate of the type specified in that the Prior art disadvantages have been avoided and a variable use is possible.

Zur Lösung dieser Aufgabe wird die im Patentanspruch 1 angegebene Merkmalskombination vorgeschlagen. Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung ergeben sich aus den abhängigen Ansprü¬ chen.To solve this problem, the feature combination specified in claim 1 is proposed. Advantageous embodiments and developments of the invention will become apparent from the dependent Ansprü¬ surfaces.

Dementsprechend wird erfindungsgemäß vorgeschlagen, dass die Reflek- toranordnung ein in dem Gehäuse gehaltenes Trägerprofil und ein damit lösbar verbindbares, als formstabiles Formteil ausgebildetes und somit aus¬ tauschbares Reflektorprofil aufweist. Dadurch wird auf einfache Weise ein modularer Aufbau geschaffen, der es erlaubt, das Bestrahlungsprofil optimal an die jeweiligen Prozessverhältnisse anzupassen. Durch die Verwendung von Profilkörpern wird über die Länge der Lampe eine definierte Geometrie vorgegeben, die durch die Auswechselbarkeit auch kurzfristig hinsichtlich, verschiedener Parameter wie der chemischen Formulierung des zu härten¬ den Beschichtungsmittels, des noch akzeptablen Wärmeeintrags auf das Substrat und der Bestrahlungsdauer bzw. -dosis abgestimmt werden kann. Dabei ergeben sich die richtigen Auslegungen häufig erst nach umfangrei¬ chen Versuchen. Dies kann durchaus kurz vor oder erst während der Inbe¬ triebnahme beispielsweise in der Druckanlage vor Ort erfolgen. Durch die Variabilität in der Reflektorgeometrie werden kostspielige Risiken vermieden. Änderungen im Produkt oder der Beschichtungschemie kann durch Wahl des geeigneten Reflektorprofils selektiv Rechnung getragen werden. Dabei wird durch den Einsatz von massiven Profilen eine hohe thermische Stand¬ festigkeit gewährleistet. Außerdem sind die Reflektorprofile für eine Wartung bzw. Reinigung leicht zugänglich.Accordingly, it is proposed according to the invention that the reflector arrangement has a carrier profile held in the housing and a reflector profile which can be detachably connected thereto and is designed as a dimensionally stable molded part and thus exchangeable. As a result, a modular structure is created in a simple manner, which makes it possible to optimally adapt the irradiation profile to the respective process conditions. Through the use of profiled bodies, a defined geometry is predetermined over the length of the lamp, which can also be exchanged at short notice with regard to various parameters such as the chemical formulation of the coating agent to be hardened, the still acceptable heat input to the substrate and the irradiation duration or dose can be adjusted. The correct interpretations often only result after extensive tests. This can certainly take place shortly before or only during commissioning, for example in the printing plant on site. Variability in reflector geometry avoids costly risks. Changes in the product or coating chemistry can be selectively accommodated by choosing the appropriate reflector profile. The use of solid profiles ensures high thermal stability. In addition, the reflector profiles are easily accessible for maintenance or cleaning.

Vorteilhafterweise sind mehrere Reflektorprofile mit unterschiedlichen Re¬ flektorgeometrien und/oder Oberflächenbeschichtungen als Baukastensys¬ tem wahlweise mit dem Trägerprofil verbindbar, wobei durch einheitliche Verbindungsflächen unabhängig von der Reflektorgeometrie eine einfache Montage gewährleistet ist.Advantageously, a plurality of reflector profiles with different reflector geometries and / or surface coatings as Baukastensys¬ system optionally connectable to the carrier profile, wherein by uniform Connecting surfaces regardless of the reflector geometry easy installation is guaranteed.

Eine weitere Verbesserung sieht vor, dass das Reflektorprofil und das Trä- gerprofil über formschlüssige Verbindungsflächen miteinander in flächigen Wärmeleitkontakt bringbar sind. Dabei ist es von Vorteil, wenn das Reflek¬ torprofil und das Trägerprofil über Verbindungsmittel, insbesondere Schraubverbindungen in gegenseitiger Flächenanlage gehalten sind.A further improvement provides that the reflector profile and the carrier profile can be brought into contact with one another by means of positive connection surfaces in flat heat-conducting contact. It is advantageous if the reflector gate profile and the carrier profile are held in mutual surface contact via connecting means, in particular screw connections.

Eine ivlontagevereinfachung ergibt sich dadurch, dass die Verbindungsmittel von der dem Reflektorprofil abgewandten Rückseite des Trägerprofils her betätigbar sind. Günstig ist es auch, wenn die Verbindungsmittel durch bei¬ spielsweise verschließbare Gehäuseklappen von der Außenseite des Ge¬ häuses her zugänglich sind.An ivlontageeinfachung results from the fact that the connecting means are operable from the rear side facing away from the reflector profile of the carrier profile. It is also favorable if the connecting means are accessible from the outside of the housing by housing flaps that can be closed, for example.

Eine weitere vorteilhafte Ausführung sieht vor, dass die Verbindungsmittel in Profilrichtung gesehen vorzugsweise über eine Langlochlagerung ein thermi¬ sches Ausgleichsspiel zwischen Reflektorprofil und Trägerprofil erlauben.A further advantageous embodiment provides that the connecting means seen in the profile direction preferably allow a thermal compensation play between reflector profile and carrier profile via a slot mounting.

In baulich vorteilhafter Realisierung sind die Verbindungsmittel durch schaft- seitig vorzugsweise auf Anschlag in das Reflektorprofil einschraubbare und kopfseitig vorzugsweise über Feder- und/oder Gleitscheiben an dem Träger¬ profil abgestützte Schraubbolzen gebildet.In structurally advantageous implementation, the connecting means are formed by the shaft preferably screwed to stop in the reflector profile and the head side preferably via spring and / or sliding discs on the Träger¬ profile supported bolt.

Vorteilhafterweise ist das Trägerprofil durch eine Kühlung, insbesondere ei¬ ne Wasserkühlung mit Kühlmittel beaufschlagbar. Dies lässt sich dadurch verwirklichen, dass das Trägerprofil mit Profilkanälen zur Durchleitung von Kühlmittel versehen ist. Dadurch ist es auch möglich, die Reflektorprofile oh¬ ne Unterbrechung des Kühlsystems in kurzer Zeit auszutauschen.Advantageously, the carrier profile can be acted upon by cooling, in particular ei¬ ne water cooling with coolant. This can be realized in that the carrier profile is provided with profile channels for the passage of coolant. This also makes it possible to exchange the reflector profiles without interrupting the cooling system in a short time.

Durch entsprechende Wandstärken ist es möglich, dass das Reflektorprofil eine von seiner Verbindungsfläche mit dem Trägerprofil abgewandte und von deren Konturverlauf abweichende gekrümmte Reflektorfläche aufweist. Die Verbindungsfläche kann daher für eine standardisierte Aufnahme ein¬ heitlich ausgebildet werden, während die Reflektorfläche selektiv an die Be¬ strahlungsbedingungen angepasst ist.By appropriate wall thicknesses, it is possible that the reflector profile facing away from its connecting surface with the carrier profile and has a curved reflector surface deviating from its contour profile. The connection surface can therefore be formed uniformly for a standardized receptacle, while the reflector surface is selectively adapted to the radiation conditions.

Um auch eine spektrale Beeinflussung zu ermöglichen, ist es vorteilhaft, wenn das Reflektorprofil an seiner der UV-Lampe zugewandten Profilseite mit einer Reflexionsbeschichtung versehen ist.In order to allow a spectral influence, it is advantageous if the reflector profile is provided on its side facing the UV lamp profile side with a reflection coating.

Für eine hohe Belastungs- bzw. Standfestigkeit ist es von Vorteil, wenn das Reflektorprofil als massiver Körper aus einem Vollmaterial gebildet ist. Her¬ stellungstechnisch ist es hierbei vorteilhaft, wenn das Reflektorprofil und das Trägerprofil als Strangpressprofilteile vorzugsweise aus Aluminium beste¬ hen.For a high load or stability, it is advantageous if the reflector profile is formed as a solid body of a solid material. In terms of manufacture, it is advantageous in this case if the reflector profile and the carrier profile preferably consist of extruded aluminum parts.

Eine weitere Vereinfachung auch hinsichtlich der erforderlichen Apparaturen für die Reflektorbeschichtung ergibt sich dadurch, dass mehrere Reflektor¬ profile als Profilstrang stirnseitig zusammengesetzt sind. Dabei sollte ge¬ währleistet sein, dass die Stoßstellen, welche einen geringeren Reflexions- wert aufweisen können, bei paarweiser Reflektoranordnung versetzt sind und sich nicht gegenüberliegen.A further simplification also with regard to the required apparatuses for the reflector coating results from the fact that a plurality of reflector profiles are assembled on the face side as a profile strand. It should be ensured that the joints, which may have a lower reflection value, are offset with a pairwise reflector arrangement and are not opposite each other.

Zur Verbesserung des Wärmeübergangs kann es von Vorteil sein, wenn zwischen den Verbindungsflächen von Reflektorprofil und Trägerprofil ein Wärmeleitmittel, insbesondere Wärmeleitpaste eingebracht ist.To improve the heat transfer, it may be advantageous if between the connecting surfaces of reflector profile and carrier profile, a heat conducting, in particular thermal paste is introduced.

Vorteilhafterweise sind jeweils ein Trägerprofil und ein zugeordnetes Reflek¬ torprofil paarweise beidseitig einer Längsmittelebene der UV-Lampe ange¬ ordnet. Für eine Verschlussfunktion der durchstrahlten Gehäuseöffnung ist es möglich, dass zwei Reflektorprofile zusammen mit zugeordneten Träger¬ profilen um jeweils eine in Profilrichtung verlaufende Achse gegeneinander schwenkbeweglich in dem Gehäuse angeordnet sind. Im Folgenden wird die Erfindung anhand eines in der Zeichnung schema¬ tisch dargestellten Äusführungsbeispiels näher erläutert. Es zeigenAdvantageously, in each case a carrier profile and an associated reflector gate profile are arranged in pairs on both sides of a longitudinal center plane of the UV lamp. For a closure function of the irradiated housing opening, it is possible for two reflector profiles, together with associated carrier profiles, to be arranged in the housing so as to be pivotable relative to each other about an axis extending in the profile direction. In the following the invention will be explained in more detail with reference to an embodiment schematically illustrated in the drawing. Show it

Fig. 1 ein UV-Bestrahlungsaggregat zur Trocknung von Druckbahnen im Querschnitt; und1 shows a UV irradiation unit for drying printing webs in cross section. and

Fig. 2 eine ausschnittsweise Vergrößerung einer Schraubverbindung im Bereich einer Reflektoranordnung des Aggregats nach Fig.1.Fig. 2 is a partial enlargement of a screw in the region of a reflector assembly of the unit according to Fig.1.

Das in der Zeichnung dargestellte UV-Bestrahlungs-aggregat besteht im Wesentlichen aus einem kastenförmigen Gehäuse 10, einer darin angeord¬ neten stabförmigen UV-Lampe 12, einer Reflektoranordnung 14 zur Reflexi¬ on des in das Gehäuse 10 abgestrahlten UV-Lichts auf eine bodenseitige Gehäuseöffnung 16 und einem Absorber 18 zur Ableitung von Verlustwärme über eine nicht gezeigte Kühleinrichtung.The UV irradiation unit shown in the drawing consists essentially of a box-shaped housing 10, a rod-shaped UV lamp 12 arranged therein, a reflector arrangement 14 for reflecting the UV light radiated into the housing 10 onto a base-side housing opening 16 and an absorber 18 for dissipating heat loss via a cooling device, not shown.

Die UV-Lampe 12 ist als zweiendige Mitteldruck-Gasentladungslampe in der Mittellängsebene 20 des Gehäuses 10 angeordnet und gibt ihre Strahlung über die Gehäuseöffnung 16 auf die darunter vorbeigeführte Substratbahn bzw. das zu bestrahlende Objekt ab. Um die Bestrahlung des Objekts zu erhöhen, ist die UV-Lampe 12 in ihrem in das Gehäuseinnere weisenden Sektor über ihre Länge von der Reflektoranordnung 14 umgeben, wobei das reflektierte Licht je nach Reflektorgeometrie divergent, parallel oder gebün- delt durch die Gehäuseöffnung 16 hindurch abgestrahlt wird. Denkbar ist auch, dass in Reflektorteilbereichen unterschiedliche Reflexionsgeometrien realisiert sind.The UV lamp 12 is arranged as a double-ended medium-pressure gas discharge lamp in the central longitudinal plane 20 of the housing 10 and emits its radiation via the housing opening 16 to the substrate web guided underneath or to the object to be irradiated. In order to increase the irradiation of the object, the UV lamp 12 is surrounded in its pointing into the housing interior sector over its length by the reflector assembly 14, the reflected light according to reflector geometry divergent, parallel or bundled through the housing opening 16 through becomes. It is also conceivable that different reflection geometries are realized in reflector subregions.

Zur wahlweisen Einstellung der Reflektoreigenschaften besteht die Reflek- toranordnung 14 aus Trägerprofilen 22 und lösbar damit verbundenen Re¬ flektorprofilen 24. Die Träger- und Reflektorprofile sind paarweise beidseitig der Längsmittelebene 20 des Gehäuses 10 bzw. der UV-Lampe 12 ange- ordnet, wobei die Profilrichtung parallel zur Lampenachse verläuft. Sie be¬ stehen als massive Strangpressprofilteile aus Aluminium, so dass speziell die Reflektorprofile 24 als komplex konturierte Formteile formstabil ausgebil¬ det sind. Dabei ist es möglich, unterschiedliche Reflektorprofile 24 nach Art eines Baukastensystems einzusetzen. In Fig.1 ist dies der besseren Veran¬ schaulichung halber für zwei Reflektorgeometrien links und rechts der Mittel- ebene 20 gezeigt, wobei im praktischen Einsatz in der Regel profilgleiche Teile spiegelsymmetrisch angeordnet sind, grundsätzlich jedoch auch a- symmetrische Anordnungen möglich sind.For optional adjustment of the reflector properties, the reflector arrangement 14 comprises carrier profiles 22 and detachably connected reflector profiles 24. The carrier and reflector profiles are arranged in pairs on both sides of the longitudinal center plane 20 of the housing 10 or the UV lamp 12. orders, wherein the profile direction is parallel to the lamp axis. They are made of aluminum as massive extruded profile parts, so that in particular the reflector profiles 24 are designed to be dimensionally stable as complex shaped moldings. It is possible to use different reflector profiles 24 in the manner of a modular system. This is shown in FIG. 1 for the sake of better illustration for two reflector geometries on the left and right of the middle plane 20, wherein profile-like parts are usually arranged mirror-symmetrically in practical use, but in principle also a-symmetrical arrangements are possible.

Die Reflektorprofile 24 und Trägerprofile 22 sind über formkomplementäre Verbindungsflächen 26, 28 formschlüssig in großflächigen Wärmeleitkontakt bringbar. Zur effektiven Wärmeabfuhr sind die Trägerprofile 22 über Profil¬ kanäle 30 für die Durchleitung von Kühlwasser an die Kühleinrichtung an- schließbar. Auf diese Weise ist es möglich, mit hohen Lampenleistungen im Bereich von einigen 10 kW zu arbeiten.The reflector profiles 24 and carrier profiles 22 can be brought into positive contact with large-area heat-conducting contact via complementary complementary connection surfaces 26, 28. For effective heat dissipation, the carrier profiles 22 can be connected to the cooling device via profile channels 30 for the passage of cooling water. In this way it is possible to work with high lamp powers in the range of a few 10 kW.

Das Trägerprofil 22 und das Reflektorprofil 24 sind im Bereich der Verbin¬ dungsflächen 26, 28 über Schraubverbindungen 32 in gegenseitiger Anlage gehalten. Um die Montage bzw. den Reflektoraustausch am Einsatzort bei¬ spielsweise in einer Druckmaschine zu vereinfachen, ist es zweckmäßig, wenn die Schraubverbindungen 32 durch Gehäuseklappen 34 von der Ge¬ häuseaußenseite her zugänglich sind.The carrier profile 22 and the reflector profile 24 are held in mutual contact in the region of the connecting surfaces 26, 28 via screw connections 32. In order to simplify assembly or reflector replacement at the place of use, for example in a printing press, it is expedient if the screw connections 32 are accessible from the outside of the housing by housing flaps 34.

Wie in Fig.2 gezeigt, sind die Schraubverbindungen 32 durch Stehbolzen 36 gebildet, welche von der Rückseite 38 des Trägerprofils 22 her rückseitig in das Reflektorprofil 24 einschraubbar sind. Im Verbindungszustand sind die Stehbolzen 36 mit ihrem abgestuften Gewindeschaft 40 auf Anschlag in das Reflektorprofil 24 eingedreht. Der Schraubkopf 42 ist dabei über Tellerfedern 44 und Gleitscheiben 46 mit definiertem Kraftschluß an dem Trägerprofil 22 abgestützt. Um ein thermisches Ausgleichsspiel zu ermöglichen, ist der Stu- fendurchbruch 48 in Profilrichtung gesehen als Langloch ausgebildet. - / -As shown in FIG. 2, the screw connections 32 are formed by stud bolts 36, which can be screwed into the reflector profile 24 from the rear side 38 of the carrier profile 22. In the connection state, the stud bolts 36 are screwed with their stepped threaded shaft 40 to stop in the reflector profile 24. The screw head 42 is supported by disc springs 44 and sliding discs 46 with defined adhesion to the support section 22. In order to enable a thermal compensation clearance, the step opening 48 is formed in the profile direction as a slot. - / -

Aufgrund der frei formbaren Profilgeometrie kann die der UV-Lampe 12 zu¬ gewandte Reflektorfläche 50 der Reflektorprofile 24 unabhängig von der Pro¬ filkontur der Verbindungsfläche 26 gestaltet werden. Zum Einsatz kommen elliptische, parabolische und kreisförmige Reflektorgeometrien wie auch Kombinationen davon. Denkbar sind auch Reflektorflächen 50 mit Freilinien¬ formen.Due to the freely deformable profile geometry, the reflector surface 50 of the reflector profiles 24 facing the UV lamp 12 can be designed independently of the profile contour of the connection surface 26. Elliptic, parabolic and circular reflector geometries as well as combinations thereof are used. Also conceivable are reflector surfaces 50 with Freilinien¬ forms.

Durch eine zusätzliche Oberflächenbeschichtung 52 der Reflektorprofile 24 kann der spektrale Bereich des reflektierten Lichts beeinflusst werden. Reinstaluminium-Oberflächen reflektieren das gesamte Spektrum, während so genannte Kaltlichtspiegel-Beschichtungen je nach Ausführung nur aus¬ gewählte spektrale Bandbreiten im UV-Bereich reflektieren. Die in der Re¬ flektoranordnung 14 absorbierte Wärme kann dabei zusätzlich zu der Was- serkühlung auch durch eine Luftkühlung mit Absaugung durch den Abluftka¬ nal 54 hindurch abgeführt werden.By an additional surface coating 52 of the reflector profiles 24, the spectral range of the reflected light can be influenced. High-purity aluminum surfaces reflect the entire spectrum, while so-called cold-light mirror coatings reflect only selected spectral bandwidths in the UV range, depending on the design. In addition to the water cooling, the heat absorbed in the reflector arrangement 14 can also be dissipated through the air cooling system with suction through the exhaust air duct 54.

Die UV- und IR-Emission der Gasentladungslampe 12 kann aus physikali¬ schen Gründen nicht spontan ein- und ausgeschaltet werden. Daher ist es vorgesehen, die Reflektoranordnung 14 beim Anfahren oder bei Betriebsun¬ terbrechungen in eine Standby-Stellung zu bringen, in der die Gehäuseöff¬ nung 16 gegen Strahlungsdurchtritt mechanisch verschlossen ist. Zu diesem Zweck sind die Trägerprofile um eine parallel zur Profilrichtung verlaufende Schwenk- bzw. Drehachse gegeneinander bewegbar, wobei die IR-Leistung von dem gekühlten Absorber 18 aufgenommen wird. Aus dieser Stellung kann ohne nennenswerten Zeitverlust durch Betätigung des Klapp- bzw. Drehmechanismus in den Produktionsmodus gewechselt werden. Anstelle eines beweglichen Reflektors ist auch der Einsatz eines gesonderten Ver- schluss-Systems möglich. The UV and IR emission of the gas discharge lamp 12 can not be switched on and off spontaneously for physical reasons. Therefore, it is intended to bring the reflector assembly 14 during startup or Betriebsun¬ interruptions in a standby position in which the Gehäuseöff¬ opening 16 is mechanically sealed against radiation passage. For this purpose, the carrier profiles are movable relative to one another about a pivot axis or axis of rotation running parallel to the profile direction, the IR power being absorbed by the cooled absorber 18. From this position can be changed without significant loss of time by pressing the folding or rotating mechanism in the production mode. Instead of a movable reflector, it is also possible to use a separate closure system.

Claims

Patemtansprüch© © Patemtansprüch 1. Bestrahlungsaggregat zur UV-Bestrahlung von insbesondere bahnför- migen Substraten mit einem Gehäuse (10), einer darin angeordneten stabförmigen UV-Lampe (12) und einer längs der UV-Lampe (12) sich erstreckenden Reflektoranordnung (14), dadurch gekennzeichnet, dass die Reflektoranordnung (14) ein in dem Gehäuse (10) gehaltenes Trägerprofil (22) und ein damit lösbar verbindbares, als formstabiles Formteil ausgebildetes Reflektorprofil (24) aufweist.1. Irradiation unit for UV irradiation of in particular web-shaped substrates with a housing (10), a rod-shaped UV lamp (12) and a UV lamp (12) extending along the reflector assembly (14), characterized the reflector arrangement (14) has a carrier profile (22) held in the housing (10) and a reflector profile (24) which can be detachably connected thereto and formed as a dimensionally stable molded part. 2. Bestrahlungsaggregat nach Anspruch 1 , dadurch gekennzeichnet, dass mehrere Reflektorprofile (24) mit unterschiedlichen Reflektorgeo¬ metrien und/oder Oberflächenbeschichtungen als Baukastensystem wahlweise mit dem Trägerprofil (22) verbindbar sind.2. Irradiation unit according to claim 1, characterized in that a plurality of reflector profiles (24) with different Reflektorgeo¬ metrics and / or surface coatings as a modular system optionally with the carrier profile (22) are connectable. 3. Bestrahlungsaggregat nach Anspruch 1 oder 2, dadurch gekenn¬ zeichnet, dass das Reflektorprofil (24) und das Trägerprofil (22) über formschlüssige Verbindungsflächen (26,28) miteinander in flächigen Wärmeleitkontakt bringbar sind.3. Irradiation unit according to claim 1 or 2, characterized gekenn¬ characterized in that the reflector profile (24) and the carrier profile (22) via positive connection surfaces (26,28) are engageable with each other in flat Wärmeleitkontakt. 4. Bestrahlungsaggregat nach einem der Ansprüche 1 bis 3, dadurch ge¬ kennzeichnet, dass das Reflektorprofil (24) und das Trägerprofil (22) über Verbindungsmittel (32), insbesondere Schraubverbindungen in gegenseitiger Anlage gehalten sind.4. irradiation unit according to one of claims 1 to 3, characterized ge indicates that the reflector profile (24) and the carrier profile (22) via connecting means (32), in particular screw connections are held in mutual contact. 5. Bestrahlungsaggregat nach Anspruch 4, dadurch gekennzeichnet, dass die Verbindungsmittel (32) von der dem Reflektorprofil (24) abge¬ wandten Rückseite (38) des Trägerprofils (22) her betätigbar sind.5. irradiation unit according to claim 4, characterized in that the connecting means (32) of the reflector profile (24) abge¬ facing back (38) of the carrier profile (22) are operable forth. 6. Bestrahlungsaggregat nach Anspruch 4 oder 5, dadurch gekenn¬ zeichnet, dass die Verbindungsmittel (32) durch beispielsweise ver- - Q - schließbare Gehäuseklappen (34) von der Außenseite des Gehäuses (10) her zugänglich sind.6. irradiation unit according to claim 4 or 5, characterized gekenn¬ characterized in that the connecting means (32) by for example - Q - closable housing flaps (34) from the outside of the housing (10) are accessible forth. 7. Bestrahlungsaggregat nach einem der Ansprüche 4 bis 6, dadurch ge- kennzeichnet, dass die Verbindungsmittel (32) in Profilrichtung gese¬ hen vorzugsweise über eine Langlochlagerung (48) ein thermisches Ausgleichsspiel zwischen Reflektorprofil (24) und Trägerprofil (22) er¬ lauben.7. Irradiation unit according to one of claims 4 to 6, character- ized in that the connecting means (32) in the profile direction hen hen preferably via a slot bearing (48) a thermal compensation game between the reflector profile (24) and carrier profile (22) er¬ , 8. Bestrahlungsaggregat nach einem der Ansprüche 4 bis 7, dadurch ge¬ kennzeichnet, dass die Verbindungsmittel (32) durch schaftseitig vor¬ zugsweise auf Anschlag in das Reflektorprofil (24) einschraubbare und kopfseitig vorzugsweise über Feder- und/oder Gleitscheiben (44,46) an dem Trägerprofil (22) abgestützte Schraubbolzen (36) gebildet sind.8. irradiation unit according to one of claims 4 to 7, characterized ge indicates that the connecting means (32) by shank vor¬ preferably abutment in the reflector profile (24) screwed and head side preferably via spring and / or sliding discs (44,46 ) on the carrier profile (22) supported bolt (36) are formed. 9. Bestrahlungsaggregat nach einem der Ansprüche 1 bis 8, dadurch ge¬ kennzeichnet, dass das Trägerprofil (22) durch eine Kühlung, insbe¬ sondere eine Wasserkühlung mit Kühlmittel beaufschlagbar ist.9. irradiation unit according to one of claims 1 to 8, characterized ge indicates that the carrier profile (22) by cooling, in particular a special water cooling can be acted upon with coolant. 10. Bestrahlungsaggregat nach einem der Ansprüche 1 bis 9, dadurch ge¬ kennzeichnet, dass das Trägerprofil (22) mit Profilkanälen (30) zur Durchleitung von Kühlmittel versehen ist.10. Irradiation unit according to one of claims 1 to 9, characterized ge indicates that the carrier profile (22) is provided with profile channels (30) for the passage of coolant. 11. Bestrahlungsaggregat nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass das Reflektorprofil (24) eine von seiner Verbin¬ dungsfläche (26) mit dem Trägerprofil (22) abgewandte und von deren Konturverlauf abweichende gekrümmte Reflektorfläche (50) aufweist.11. Irradiation unit according to one of claims 1 to 10, characterized in that the reflector profile (24) facing away from its Verbin¬ training surface (26) with the carrier profile (22) and deviating from the contour of the curved curved reflector surface (50). 12. Bestrahlungsaggregat nach einem der Ansprüche 1 bis 11 , dadurch gekennzeichnet, dass das Reflektorprofil (24) an seiner der UV-Lampe12. Irradiation unit according to one of claims 1 to 11, characterized in that the reflector profile (24) on its UV lamp (12) zugewandten Profilseite mit einer Reflexionsbeschichtung (52) ver¬ sehen ist. (12) facing profile side with a reflective coating (52) ver¬ see is. 13. Bestrahlungsaggregat nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, dass das Reflektorprofil (24) als massiver Körper aus einem Vollmaterial gebildet ist.13. Irradiation unit according to one of claims 1 to 12, characterized in that the reflector profile (24) is formed as a solid body of a solid material. 14. Bestrahlungsaggregat nach einem der Ansprüche 1 bis 13, dadurch gekennzeichnet, dass das Reflektorprofil (24) und das Trägerprofil (22) als Strangpressprofilteile vorzugsweise aus Aluminium bestehen.14. Irradiation unit according to one of claims 1 to 13, characterized in that the reflector profile (24) and the carrier profile (22) preferably consist of extruded profile parts made of aluminum. 15. Bestrahlungsaggregat nach einem der Ansprüche 1 bis 14, dadurch gekennzeichnet, dass mehrere Reflektorprofile (24) als Profilstrang stirnseitig zusammengesetzt sind.15. Irradiation unit according to one of claims 1 to 14, characterized in that a plurality of reflector profiles (24) are assembled as a profile strand frontally. 16. Bestrahlungsaggregat nach einem der Ansprüche 1 bis 15, dadurch gekennzeichnet, dass zwischen den Verbindungsflächen (26,28) von16. Irradiation unit according to one of claims 1 to 15, characterized in that between the connecting surfaces (26,28) of Reflektorprofil (24) und Trägerprofil (22) ein Wärmeleitmittel, insbeson¬ dere Wärmeleitpaste eingebracht ist.Reflector profile (24) and carrier profile (22) a heat conducting, insbeson dere thermal paste is introduced. 17. Bestrahlungsaggregat nach einem der Ansprüche 1 bis 16, dadurch gekennzeichnet, dass jeweils ein Trägerprofil (22) und ein zugeordne¬ tes Reflektorprofil (24) paarweise beidseitig einer Längsmittelebene (20) der UV-Lampe (12) angeordnet sind.17. Irradiation unit according to one of claims 1 to 16, characterized in that in each case a carrier profile (22) and a zugeordne¬ tes reflector profile (24) in pairs on both sides of a longitudinal center plane (20) of the UV lamp (12) are arranged. 18. Bestrahlungsaggregat nach einem der Ansprüche 1 bis 3, dadurch ge- kennzeichnet, dass zwei Reflektorprofile (24) zusammen mit zugeord¬ neten Trägerprofilen (22) um jeweils eine in Profilrichtung verlaufende Achse gegeneinander schwenkbeweglich in dem Gehäuse (10) ange¬ ordnet sind. 18. Irradiation unit according to one of claims 1 to 3, character- ized in that two reflector profiles (24) together with zugeord¬ Neten carrier profiles (22) are arranged in each case about an axis extending in the direction of profile pivotally against each other in the housing (10) ange¬ ,
EP05767850A 2004-08-06 2005-07-19 Irradiation unit Expired - Lifetime EP1779050B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004038592A DE102004038592A1 (en) 2004-08-06 2004-08-06 irradiation unit
PCT/EP2005/007836 WO2006015694A1 (en) 2004-08-06 2005-07-19 Irradiation unit

Publications (2)

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EP1779050A1 true EP1779050A1 (en) 2007-05-02
EP1779050B1 EP1779050B1 (en) 2012-02-22

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US (1) US7858956B2 (en)
EP (1) EP1779050B1 (en)
AT (1) ATE546702T1 (en)
DE (1) DE102004038592A1 (en)
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WO (1) WO2006015694A1 (en)

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Publication number Publication date
DE102004038592A1 (en) 2006-03-16
US20080277600A1 (en) 2008-11-13
ATE546702T1 (en) 2012-03-15
US7858956B2 (en) 2010-12-28
WO2006015694A1 (en) 2006-02-16
EP1779050B1 (en) 2012-02-22
DK1779050T3 (en) 2012-06-18

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